Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.
Threads
Undergrad Can distant stars orbit Earth faster than light in general relativity?
- JohnNemo
- · Replies 193 ·
Undergrad Interstellar Travel Without Propulsion or Time Dilation
- Yemmy
- · Replies 11 ·
Undergrad Is force/mass ratio an invariant quantity in GR?
- JohnNemo
- · Replies 7 ·
Undergrad Charged black hole - static electric field lines
- dllahr
- · Replies 14 ·
Undergrad Parabolic Motion from Hyperbolic Motion
- SiennaTheGr8
- · Replies 2 ·
High School Does electron-positron annihilation inside a black hole change its gravitational effect?
- Eric Walker
- · Replies 7 ·
Undergrad Stress–energy pseudotensor of gravitation field for DE
- sergiokapone
- · Replies 2 ·
Graduate Difference between event horizons and trapped surfaces
- Nick Prince
- · Replies 8 ·
Undergrad Is four-force magnitude Lorentz-invariant with variable mass?
- SiennaTheGr8
- · Replies 13 ·
Graduate Improper and non-orthochronous group
- PRANAV UPADHYAY
- · Replies 1 ·
Undergrad Can I be taught general and special Relativity on this forum
- P J Strydom
- · Replies 70 ·
High School Light Clock Traveling in Z Direction
- sqljunkey
- · Replies 9 ·
High School How can Closed Timelike Curves be made?
- TheQuestionGuy14
- · Replies 1 ·
Graduate Interior Schwarzschild Metric: Pressure Dependence
- Sonderval
- · Replies 6 ·
High School Does the Earth accelerate upward to catch falling objects?
- TheQuestionGuy14
- · Replies 33 ·
High School How exactly does gravity work?
- TheNerdyBushman
- · Replies 81 ·
Undergrad Why can't general relativity be derived from special relativity?
- nomadreid
- · Replies 15 ·
Undergrad Black Holes and Charged Particles
- DuckAmuck
- · Replies 38 ·
Graduate Can dust scattering mask gravitational waves in LIGO?
- arupel
- · Replies 1 ·
High School Does a relativistic hockey puck catch a manhole edge due to length contraction?
- Grinkle
- · Replies 26 ·
Undergrad Factor of 1/2 in Lorentz generator definitions
- nigelscott
- · Replies 3 ·
High School Increase in PE due to increased mass
- Altair Tans
- · Replies 23 ·
High School Einstein's curvature vs. Newton's
- Peter Martin
- · Replies 22 ·
Undergrad Books and PDFs for special relativistic calculus
- Somali_Physicist
- · Replies 11 ·
Graduate Why is Killing vector field normal to Killing horizon?
- JunhoPhysics
- · Replies 19 ·
High School I cannot grasp simultaneity in Special Relativity
- Hypercube
- · Replies 9 ·
Undergrad Do Black Holes Have Walls That Define Their Structure?
- Gondur
- · Replies 5 ·
Graduate Strange Tetrad Form of Einstein-Hilbert Action
- bolbteppa
- · Replies 2 ·
Undergrad How much time dilation is there within a contracting remnant
- DC0
- · Replies 21 ·
Undergrad Can a Gravitational 'Gun' Accelerate Objects?
- LAP3141
- · Replies 10 ·
High School Addition of velocities at speeds near C - any differences?
- Alex Pavel
- · Replies 34 ·
High School Gravitational Wave Communication System
- alan123hk
- · Replies 3 ·
High School Does light travel further when time dilation slows the clock?
- Jose Estrada
- · Replies 2 ·
Undergrad Pseudotensors in different dimensions
- illuminates
- · Replies 15 ·
Undergrad Do vectors in Minkowski space change sign under parity transformation?
- illuminates
- · Replies 4 ·
Graduate Is There a Proper Way to Define Energy in General Relativity?
- bhobba
- · Replies 5 ·
Undergrad Relativistic Particles: Reaching Absolute Temperature?
- Somali_Physicist
- · Replies 8 ·
Undergrad Ohanian's Lagrangian approach to deriving general relativity from linearised equations
- bhobba
- · Replies 18 ·
High School Does acceleration cause spacetime curvature in special relativity?
- John Anthony
- · Replies 8 ·
Graduate Variation of Scalar Field Action: Polchinski's AdS/CFT Review
- craigthone
- · Replies 2 ·
Undergrad Curvature and Schwarzschild metric
- vibhuav
- · Replies 11 ·
Undergrad Energy-momentum formula and deBroglie wavelength
- sha1000
- · Replies 4 ·
Undergrad Measuring Speed of Light Relative to Earth
- Chris84567
- · Replies 8 ·
High School Does curvature of the time axis create closed timelike curves?
- TheQuestionGuy14
- · Replies 3 ·
Undergrad Center of mass velocity in relation to total momentum and energy
- Hiero
- · Replies 4 ·
Undergrad Flash open manhole cover paradox
- Alan McIntire
- · Replies 28 ·
Undergrad If a rock fell 20,000 meters to Earth Question
- Jack981
- · Replies 7 ·
Undergrad Why Is a Violation of Causality a Problem?
- Keln
- · Replies 5 ·
High School Faster than Light and wormholes
- Richie Smash
- · Replies 17 ·
Graduate Is There a Relativistic Version of Hooke's Law for Materials?
- Dale
- · Replies 8 ·
Undergrad Confirming Covariant Derivative in Hartle's Gravity
- PeroK
- · Replies 10 ·
Undergrad Separating Overlapping Event Horizons: Theory
- anubodh
- · Replies 3 ·
Undergrad Length Contraction & Mass Increase in GR | General Relativity
- Ranku
- · Replies 14 ·
High School Is energy a form of matter in general relativity?
- Spar
- · Replies 3 ·
Undergrad Geometric animation to visualize special relativity relationships
- stickman76
- · Replies 5 ·
Graduate Difference Between Covariance and Diffeomorphism Invarience
- bhobba
- · Replies 11 ·
Undergrad 4-momentum of a massless particle
- pellman
- · Replies 3 ·
Undergrad How to fill the stress energy tensor for multi body systems
- BiGyElLoWhAt
- · Replies 29 ·
Undergrad Proving Effects of Stress-Energy Tensor on Curvature
- VladZH
- · Replies 5 ·
High School Special relativity equation question
- Alex Pavel
- · Replies 19 ·
High School Do black hole firewalls form from blue-shifted Hawking radiation?
- johnkclark
- · Replies 13 ·
High School Why Light Experienced a Doppler Shift?
- Mohammad Fajar
- · Replies 60 ·
High School Black Holes: Rotating vs Non-Rotating
- Souhardya Nandi
- · Replies 4 ·
Undergrad Can Spacetime Be Visualized in a 2D Universe Like Flatland?
- Gabriele99
- · Replies 2 ·
Undergrad Why wouldn't an Alcubierre drive warp nearby planets?
- jsk108
- · Replies 2 ·
High School Can gravity result from electron orbits and magnetic field interactions?
- Connor Austin
- · Replies 3 ·
High School What does Einstein mean by common time in special relativity?
- WilliamMGiraldo
- · Replies 8 ·
Undergrad Derivative of Lorentz factor and four-acceleration
- Frank Castle
- · Replies 14 ·
Undergrad Negative Mass and Hawking Radiation
- fox26
- · Replies 6 ·
Undergrad Does velocity decrease with time dilation?
- Mohammed Ayaz Quadri
- · Replies 30 ·
High School Can coordinate changes create forces in Minkowski space?
- sqljunkey
- · Replies 1 ·
High School Can FTL Travel be Achieved With Mass of a Photon?
- Lunct
- · Replies 13 ·
High School I understand time a little better
- paulo84
- · Replies 38 ·
Undergrad Can Wormholes Be Stabilized Using Negative Energy Density?
- Christofer Br
- · Replies 6 ·
High School Solving Special Relativity Equation: Rail Car Thought Experiment
- Alex Pavel
- · Replies 3 ·
Graduate Where does the ISCO inequality L ≥ √3 c Rsch come from?
- quasarLie
- · Replies 2 ·
Graduate GR to Naive Physics: Is it Possible?
- Simon Bridge
- · Replies 1 ·
Undergrad How does Bondi K-calculus resolve the twin paradox?
- Mohammad Fajar
- · Replies 5 ·
High School Why do clocks experience time dilation in special and general relativity?
- Galactic explosion
- · Replies 31 ·
Undergrad Measuring Light Speed Anisotropy
- Paul Colby
- · Replies 11 ·
Undergrad Does a metric exist for this surface?
- DAirey
- · Replies 14 ·
High School A is slower than B, B is slower than A. Where did it go?
- Bartolomeo
- · Replies 7 ·
High School Is Special Relativity Universally Accepted?
- Jimmy87
- · Replies 46 ·
Undergrad Why isn't the Roemer type experiment a one way measure of c?
- Alfredo Tifi
- · Replies 56 ·
Undergrad Gravitational Waves vs Universe Expansion Rate
- skanskan
- · Replies 4 ·
Undergrad Confusion about Frame Dragging
- tzimie
- · Replies 34 ·
Undergrad Why doesn't tidal gravity appear in Einstein's elevator thought experiment?
- Wes Tausend
- · Replies 5 ·
Insights The Schwarzschild Metric: Part 3, A Newtonian Comparison - Comments
- RUTA
- · Replies 2 ·
Insights The Schwarzschild Metric: Part 2, The Photon Sphere - Comments
- RUTA
- · Replies 2 ·
Undergrad Einstein's Pursuit of Unified Theory: Motivation and Observations
- Npac123
- · Replies 5 ·
High School Is the Double-Slit Experiment Validating Special Relativity's Influence on Time?
- Marcus de Brun
- · Replies 11 ·
Undergrad What does Alice see when falling toward a black hole's event horizon?
- Felix Fowler
- · Replies 13 ·
High School How does a laser beam path differ between moving and rest frames?
- GAURAV DADWAL
- · Replies 48 ·
Undergrad Explaining Relativity within 3 minutes
- Tio Barnabe
- · Replies 14 ·
High School High school student wins $250K explaining relativity with a truck
- jedishrfu
- · Replies 2 ·
Undergrad Why Does ds^2 Equal 0 in Metrics?
- Arman777
- · Replies 10 ·
High School Is the association of QG with BH a fake
- ftr
- · Replies 15 ·
High School Do observers moving at relativistic speeds experience time in slow motion or fast forward?
- Delta2
- · Replies 8 ·
High School Order of events and cause and effect
- joneall
- · Replies 26 ·
Graduate Where can I find papers on Kerr-Bolt spacetime derivation?
- Sumarna
- · Replies 2 ·